| Idanha-a-Nova to Joliet (Illinois) | 4,072.04 mi (6,553.32 km) |
| Idanha-a-Nova to Jonesboro (Arkansas) | 4,385.96 mi (7,058.51 km) |
| Idanha-a-Nova to Joplin (Missouri) | 4,519.89 mi (7,274.07 km) |
| Idanha-a-Nova to Joppatowne (Maryland) | 3,577.85 mi (5,758.00 km) |
| Idanha-a-Nova to Juana Díaz (Puerto Rico) | 3,810.31 mi (6,132.10 km) |
| Idanha-a-Nova to Junction City (Kansas) | 4,554.52 mi (7,329.80 km) |
| Idanha-a-Nova to Juneau (Alaska) | 4,988.53 mi (8,028.26 km) |
| Idanha-a-Nova to Jupiter (Florida) | 4,182.83 mi (6,731.61 km) |
| Idanha-a-Nova to Jupiter Farms (Florida) | 4,188.25 mi (6,740.33 km) |
| Idanha-a-Nova to Jurupa Valley (California) | 5,666.81 mi (9,119.85 km) |
| Idanha-a-Nova to Justice (Illinois) | 4,050.21 mi (6,518.19 km) |
| Idanha-a-Nova to Kahului (Hawaii) | 7,792.09 mi (12,540.16 km) |
| Idanha-a-Nova to Kailua (Hawaii) | 7,793.85 mi (12,542.99 km) |
| Idanha-a-Nova to Kalamazoo (Michigan) | 3,930.96 mi (6,326.27 km) |
| Idanha-a-Nova to Kalispell (Montana) | 4,894.42 mi (7,876.81 km) |
